diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9706178..3336182 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.CI_RUNS_ON || 'ubuntu-latest' }}
 
     steps:
       - name: Checkout repository